Device for compressing materials of or into a more or less viscid condition



June4, 1940- A. SONSTHAGEN 2,203,549

DEVICE FOR COMPRESSING MATERIALS OF OR INTO A MORE OR LESS VISCID CONDITION Filed Jan. 8, 1937 JSbdoR/Y So vasTba e n g;

Patented June 4, 1940 UNITED STATES DEVICE FOR COMPRESSING MATERIALS F OR INTO A MORE OR LESS VISCID CONDI- Asbjorn Sonsthagen, Snaresbrook, London,

Engl

and

Application January 8, 1937, Serial No. 119,708 In Great Britain January 10, 1936 4 Claims.

This invention relates to an improved device for compressing materials of, or into, a-more or less viscid condition, and it has for-its object to provide a simple and efiicient device by means of which materials, which are in or can be brought into a more or less viscid condition, may be rapidly subjected to considerable pressure.

A further object of the invention is to provide a device which may be employed for the purpose of compressing the materials with a view to storage underpressure thereby permitting the application of the said fluid pressure for various mechanical purposes; it may also be used for the compression of materials which it is desired to subject to some treatment such as grinding or mixing or both grinding and mixing for example, the said treatment to take place whilst the material is compressed and for which purpose there may be combined with the means for compressingthe material, appropriate grinding, mixing or other elements.

In order that the invention may be the better understood, reference is made to the accompanying drawing, in which:

The figure is a sectional view showing somewhat diagrammatically one of many possible forms of the invention.

Referring to the accompanying drawing where it is assumed that the stationary body indicated by la is in the form of a circular disc or plate, said disc is provided with at least one pocket, such as 2, preceded by an inclined surface 3, which forms with the disc a wedge-shaped approach, and between which and the pocket is a parallel passage, hereinafter referred to as the entrance passage 4 being disposed adjacent the peripheral portion of the disc and arranged successively upon an arc concentric with the centre L0 of rotation of the disc.

9 indicates a second disc or plate which forms, as it were, a closure for the pocket, the entrance passage being formed by the clearance between the bottom of the wall 4 and the said disc. It

.5 will be understood that the clearance is very small, say, for example, one ten-thousandth of an inch.

One or both of the discs or plates may rotate,

the direction of rotation where both of the said discs or plates rotate being each opposite.

Both the pocket and wedge-shaped approach have end walls to prevent the material from exuding from the ends of the approach and pocket.

5 It will be understood that there should be,

9 The pressure of the material rises considerdisposed at different distances in the length of the reservoir away from the pocket and with one or' more taps or cocks, whereby the material may be drawn off continuously or fromtime to time as may be desired in order to regulate the amount of liquid passing to the said reservoir and the pressure therein, as, obviously, as soon as the pressure of the material in the reservoir equals that in the pocket, the passage of the material from the pocket ceases.

If the material is made to flow continuously through the reservoir, the pressure will be dependent on the relation between the amount of material passed into and out of the reservoir. This difference can be regulated at will.

Such material as passes through the pocket is caused to undergo a whirling or gyratorymotion in the said pocket which may be utilized for mixing purposes and. which is greatly influenced by the pressure at which it passes.

The length of time occupied for thematerial to pass through the reservoir may be controlled either by increasing the length of said reservoir or regulating the rate of discharge therefrom.

Instead of passing the material to a reservoir and while in the said reservoir exposingit to a certain pressure for a certain time, it may, while still under pressure, be discharged from the. pocket directly into the atmosphere.

Instead of a rotary disc a roller may be employed. I

The approaches may be of substantial dimen sions, and the angle of the bottom thereof may vary from 2 to the length of the inclined surface being, for example, one to eight inches, the depth of the approach at the deepest part being half an inch.

' A pressure creating approach must generally be preceded by a fiat part of a couple of inches to give the material time for clinging before reaching the incline, where the increase of pressure takes place.

As will be understood, in view of the high degree of pressure to which the material may be subjected in the pockets, there is a tendency for the pocket and. disc to separate and suitable provision would be made for holding them against separation, and preferably such means would be of anature such asto provide for adjustment according to thepressure the disk is required to resist.

The rigidity required would have to take into account the flex of the material of which the parts are formed, inside the limits of its natural elasticity.

The form and construction of the'pocket may also be varied as desired, providing said pocket presents the essential feature of the invention in that they cause the pressure of the; material in the pocket to be raised to a veryhigh degree.

As the material is found to undergo reshufiling in these pockets and as this action is taking place under high pressure, it tends very materially to increase the wetting of pigments.

material, or a valve or other device for permitting the controlledescape of the'material may be provided.

I claim:

1. In a machine for compressing viscid materials, relatively moving members, the first member having a smooth surface to receive said material, the second member presenting a surface inclined to the first member, to form therewith a long wedge shaped passage which tapers in the direction of the relative movement of the other member at a sharp angle, sharp enough to progressively highlycompress the material; a closed pressure pocket rigid in said second member near the narrower end of said wedge-shaped passage,

and having an open side adjacent to the first member, all other sides of the pocket adjacent to said first member being closed, said first member forming a closure for said open side, said members forming a very fine entrance gap to the pocket at said narrower end, the marginal walls of the pocket being close enough to the first member substantially to resist leakage from the pocket; the length and small angle of the wedge shaped chamberand the length and fineness of said gap causing high pressure in saidpocket, means for regulating the pressure in the pocket comprising a bleed communicating with the pocket and means for controlling the effective size of the bleed.

, 2. In a machine for compressing viscid materials, relatively moving members, the first member having a smooth surface to receivesaid material, the second member presenting a surface inclined to the first member, to form therewith a long wedge shaped passage which tapers in the direction of the relative movement of the other member at a sharp angle, sharp enough to progressively highly compress the material; a closed pressure pocket rigid in said second member near the narrower end of said wedge-shaped passage, and having an open side adjacent to the first member, all other sides of the pocket adjacent to said first member being closed, said first member forming a closure for said open-side, said mem- 'bers forming a very fine entrance gap to the pocket at said narrower end, the marginal walls of the pocket being close enough to the first member substantially to resist leakage from the pocket; the length and small angle of the wedge shaped chamber and the length and fineness of said gap causing high pressure in said p0cket,.a

chamber communicating with the pocket, a bleed communicating with the chamber and means for controlling the effective size of the bleed.

3. In a machine for compressing viscid materials, relatively moving members, the first member having a smooth surface to receive said material, the second member presenting a surface inclined to thefirst member, to form therewith a long wedge shaped passage which tapers in the direction of relative movement of the other member at a sharp angle not greater than about 2 to 30 degrees, to progressively very highly compress the material; a pressure pocket rigid in said second member near the sharp edge of. said wedge-shaped passage, and having an open side adjacent to the first member, all other sides of the pocket being closed, said first member forming a closure for said open side, said members forming gaps to provide respectively a very fine entrance gap tothe pocket of about .0001 inch at said sharp edge and an exit passage at the opposite side of said pocket, said entrance passage being in length in said directionapproximately one-fourth the length of the wedge-like passage, the dimension of said pocket from entrance to exit passage being approximately as great as said length of. the entrance passage, the great length and very small angle of the wedge shaped 'chamber and the length and fineness ofsaid gaps causing very high pressure in said pocket, the marginal walls of said pocket being close enough to said first member to maintain said high pressure, means for'regulating the pressure in the pocket comprising a bleed communicating with the pocket and means for controlling the effective size of the bleed. I

4. In' a machine for compressing viscid materials, relatively moving members, the first member having a smooth surface to receive said material, the second member presenting a surface inclined.- to the first member, to form therewith a long wedge shaped passage which tapers in the direction of, relative movement of the other member at a sharp angle not greater than about 2 /9, to 30 degrees, to progressively very highly compress the material; a pressure pocket rigid in said second member near the sharp edge of said wedge-shaped passage, and having an open side adjacent to the first member, all other sides of the pocket being closed, said first member form'- ing a closure for said open side, said members forming gaps to provide respectively a very fine entrance gap to the pocket of about .0001 inch at said sharp edge and an exit passage at the opposite side of said pocket, said entrance passage being in length in said direction approximately one-fourth the length of the wedge-like passage,

the dimension of said pocket from entrance to 'exit passage being approximately as great as said length of the entrance passage, the great length 

